1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
|
//--------------------------------------------------------------------------
// $Id: x08.java 11301 2010-11-02 17:21:08Z airwin $
//--------------------------------------------------------------------------
//--------------------------------------------------------------------------
// Copyright (C) 2001 Geoffrey Furnish
// Copyright (C) 2001, 2002, 2003, 2004 Alan W. Irwin
// Copyright (C) 2002 Maurice LeBrun
// Copyright (C) 2002 Joao Cardoso
// Copyright (C) 2004 Andrew Ross
//
// This file is part of PLplot.
//
// PLplot is free software; you can redistribute it and/or modify
// it under the terms of the GNU Library General Public License as published by
// the Free Software Foundation; version 2 of the License.
//
// PLplot is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Library General Public License for more details.
//
// You should have received a copy of the GNU Library General Public License
// along with PLplot; if not, write to the Free Software
// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
//--------------------------------------------------------------------------
//--------------------------------------------------------------------------
// Implementation of PLplot example 8 in Java.
//--------------------------------------------------------------------------
package plplot.examples;
import plplot.core.*;
import java.lang.Math;
class x08 {
static final int XPTS = 35;
static final int YPTS = 46;
PLStream pls = new PLStream();
static double alt[] = { 60.0, 20.0 };
static double az[] = { 30.0, 60.0 };
static String[] title =
{
"#frPLplot Example 8 - Alt=60, Az=30",
"#frPLplot Example 8 - Alt=20, Az=60",
};
// cmap1_init1
// Initializes color map 1 in HLS space.
// Basic grayscale variation from half-dark (which makes more interesting
// looking plot compared to dark) to light.
// An interesting variation on this:
// s[1] = 1.0
void cmap1_init( int gray )
{
double [] i = new double[2];
double [] h = new double[2];
double [] l = new double[2];
double [] s = new double[2];
boolean [] rev = new boolean[2];
i[0] = 0.0; // left boundary
i[1] = 1.0; // right boundary
if ( gray == 1 )
{
h[0] = 0.0; // hue -- low: red (arbitrary if s=0)
h[1] = 0.0; // hue -- high: red (arbitrary if s=0)
l[0] = 0.5; // lightness -- low: half-dark
l[1] = 1.0; // lightness -- high: light
s[0] = 0.0; // minimum saturation
s[1] = 0.0; // minimum saturation
}
else
{
h[0] = 240; // blue -> green -> yellow ->
h[1] = 0; // -> red
l[0] = 0.6;
l[1] = 0.6;
s[0] = 0.8;
s[1] = 0.8;
}
rev[0] = false; // interpolate on front side of colour wheel.
rev[1] = false; // interpolate on front side of colour wheel.
pls.scmap1n( 256 );
pls.scmap1l( false, i, h, l, s, rev );
}
// Does a series of 3-d plots for a given data set, with different viewing
// options in each plot.
public static void main( String[] args )
{
new x08( args );
}
public x08( String[] args )
{
int i, j, k;
final int LEVELS = 10;
double[] x = new double[ XPTS ];
double[] y = new double[ YPTS ];
double[][] z = new double[XPTS][YPTS];
double clevel[] = new double[LEVELS];
double clev_null [] = new double[0];
double xx, yy, r;
double zmin = Double.MAX_VALUE, zmax = Double.MIN_VALUE;
int ifshade;
// Parse and process command line arguments.
pls.parseopts( args, PLStream.PL_PARSE_FULL | PLStream.PL_PARSE_NOPROGRAM );
boolean rosen = true;
// Initialize plplot.
pls.init();
for ( i = 0; i < XPTS; i++ )
{
x[i] = (double) ( i - ( XPTS / 2 ) ) / (double) ( XPTS / 2 );
if ( rosen )
x[i] *= 1.5;
}
for ( j = 0; j < YPTS; j++ )
{
y[j] = (double) ( j - ( YPTS / 2 ) ) / (double) ( YPTS / 2 );
if ( rosen )
y[j] += 0.5;
}
for ( i = 0; i < XPTS; i++ )
{
xx = x[i];
for ( j = 0; j < YPTS; j++ )
{
yy = y[j];
if ( rosen )
{
z[i][j] = Math.pow( 1. - xx, 2. ) + 100 *
Math.pow( yy - Math.pow( xx, 2. ), 2. );
// The log argument may be zero for just the right grid.
if ( z[i][j] > 0. )
z[i][j] = Math.log( z[i][j] );
else
z[i][j] = -5.; // -MAXFLOAT would mess-up up the scale
}
else
{
r = Math.sqrt( xx * xx + yy * yy );
z[i][j] = Math.exp( -r * r ) * Math.cos( 2.0 * Math.PI * r );
}
if ( zmin > z[i][j] )
zmin = z[i][j];
if ( zmax < z[i][j] )
zmax = z[i][j];
}
}
double step = ( zmax - zmin ) / ( LEVELS + 1 );
for ( i = 0; i < LEVELS; i++ )
clevel[i] = zmin + step * ( i + 1 );
pls.lightsource( 1., 1., 1. );
for ( k = 0; k < 2; k++ )
{
for ( ifshade = 0; ifshade < 4; ifshade++ )
{
pls.adv( 0 );
pls.vpor( 0.0, 1.0, 0.0, 0.9 );
pls.wind( -1.0, 1.0, -0.9, 1.1 );
pls.col0( 3 );
pls.mtex( "t", 1.0, 0.5, 0.5, title[k] );
pls.col0( 1 );
if ( rosen )
pls.w3d( 1.0, 1.0, 1.0, -1.5, 1.5, -0.5, 1.5, zmin, zmax,
alt[k], az[k] );
else
pls.w3d( 1.0, 1.0, 1.0, -1.0, 1.0, -1.0, 1.0, zmin, zmax,
alt[k], az[k] );
pls.box3( "bnstu", "x axis", 0.0, 0,
"bnstu", "y axis", 0.0, 0,
"bcdmnstuv", "z axis", 0.0, 0 );
pls.col0( 2 );
if ( ifshade == 0 ) // diffuse light surface plot
{
cmap1_init( 1 );
// with new interface haven't yet made null work so have
// to put in specific zero-length array.
pls.surf3d( x, y, z, 0, clev_null );
}
else if ( ifshade == 1 ) // magnitude colored plot
{
cmap1_init( 0 );
pls.surf3d( x, y, z, PLStream.MAG_COLOR, clev_null );
}
else if ( ifshade == 2 ) // magnitude colored plot with faceted squares
{
cmap1_init( 0 );
pls.surf3d( x, y, z, PLStream.MAG_COLOR | PLStream.FACETED, clev_null );
}
else // magnitude colored plot with contours
{
cmap1_init( 0 );
pls.surf3d( x, y, z, PLStream.MAG_COLOR | PLStream.SURF_CONT | PLStream.BASE_CONT, clevel );
}
}
}
pls.end();
}
}
//--------------------------------------------------------------------------
// End of x08.java
//--------------------------------------------------------------------------
|